A control method of a cooking appliance and a cooking appliance

Abstract

This application discloses a control method for a cooking appliance and the cooking appliance itself. The control method includes: during the operation of the cooking appliance, periodically acquiring temperature sensing values ​​from a temperature sensor of the cooking appliance at a second preset sampling period; when a later temperature sensing value T2 is higher than a previous temperature sensing value T1, using the sum of the previous temperature sensing value T1 and a temperature adjustment value K as the temperature value of the cooking appliance at the moment the later temperature sensing value T2 is acquired; and after determining the temperature value of the cooking appliance at the moment the later temperature sensing value T2 is acquired, adjusting the value of the temperature adjustment value K. According to this application, when the sensed temperature of the temperature sensor increases, the sensed value is not accepted, avoiding the influence of interference signals.

Description

Technical Field

[0001] This application relates to the field of cooking appliance technology, and more specifically to a control method for a cooking appliance and a cooking appliance. Background Technology

[0002] The cooking process of cooking appliances is generally divided into multiple stages. In each stage, when the temperature sensor detects that the food temperature in the pot has reached a preset value, the cooking process proceeds to the next stage. However, the operating environment of cooking appliances is quite complex, especially when faced with strong interference from the power grid (such as lightning strikes, surges, etc.) or electromagnetic interference from the heating of the IH cooking appliance itself. Especially when the interference lasts for a long time (for example, even several seconds), ordinary filtering methods cannot filter out the interference. This causes the MCU to perceive a sudden temperature change and mistakenly jump to the next stage of the cooking process (i.e., the current stage does not reach the specific temperature condition but jumps to the next stage), resulting in abnormal cooking and affecting the cooking effect.

[0003] Therefore, a cooking appliance is needed to at least partially solve the above problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the first aspect of this application provides a method for controlling a cooking appliance, comprising:

[0006] During the operation of the cooking appliance, the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at a second preset sampling period.

[0007] When the subsequent temperature sensing value T2 is higher than the previous temperature sensing value T1, the sum of the previous temperature sensing value T1 and the temperature adjustment value K is taken as the temperature value of the cooking appliance at the moment when the subsequent temperature sensing value T2 is acquired.

[0008] Furthermore, after determining the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired, the value of the temperature adjustment value K is adjusted.

[0009] According to this application, when the heating temperature rises, the influence of interference signals cannot be ruled out. Therefore, such data is not accepted, and the temperature rise is forcibly controlled to prevent the cooking process from prematurely entering the next stage before the current stage is completed, thus affecting the cooking effect. In this way, interference factors are eliminated to a certain extent, while the upward trend of the temperature is preserved to a certain extent. This approach balances both aspects, and comprehensive analysis and processing are more conducive to obtaining effective temperature data. In actual heating processes, temperature changes are not constant; timely adjustment of the K value is beneficial for obtaining effective temperature data.

[0010] Optionally, the control method further includes:

[0011] When the subsequent temperature sensing value T2 is equal to the previous temperature sensing value T1

[0012] The sum of the previous temperature sensing value T1 and the temperature adjustment value K is taken as the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired; or, the next temperature sensing value T2 is taken as the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired.

[0013] According to this application, when the data sensed by the temperature sensor indicates that the temperature remains unchanged, the data can be accepted, or it can be assumed that the temperature has increased. The control method is flexible, but it will not affect the control of the cooking process.

[0014] Optionally, the control method further includes:

[0015] When the subsequent temperature sensing value T2 is less than the previous temperature sensing value T1, the subsequent temperature sensing value T2 is taken as the temperature value of the cooking appliance at the moment when the subsequent temperature sensing value T2 is acquired.

[0016] According to this application, when the data sensed by the temperature sensor indicates that the temperature has dropped, the data is accepted and will not affect the control of the cooking process.

[0017] Optionally, adjusting the temperature adjustment value K includes:

[0018] The temperature adjustment value K is adjusted based on the latter temperature sensing value T2 and the former temperature sensing value T1.

[0019] According to this application, adjusting the K value based on the actual temperature sensing value is more conducive to obtaining effective temperature data.

[0020] Optionally, adjusting the temperature adjustment value K based on the later temperature sensing value T2 and the previous temperature sensing value T1 includes:

[0021] When the subsequent temperature sensing value T2 is higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, make K2 = K1 × (1 + M);

[0022] When the subsequent temperature sensing value T2 is equal to the sum of the previous temperature sensing value T1 and the temperature adjustment value K, then K2 = K1;

[0023] When the subsequent temperature sensing value T2 is lower than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, make K2 = K1 × (1-N);

[0024] Where K2 is the adjusted temperature adjustment value K, K1 is the original temperature adjustment value K, and 0 <M<1,0<N<1。

[0025] Furthermore, 1% ≤ M ≤ 20%, and / or 1% ≤ N ≤ 20%.

[0026] Furthermore, 5% ≤ M ≤ 15%, and / or 5% ≤ N ≤ 15%.

[0027] According to this application, when the temperature is rising rapidly (the rate of temperature increase increases), the K value increases accordingly to match the upward trend, avoiding misinterpreting the actual temperature increase as interference. When the temperature is rising steadily (the rate of temperature increase remains constant), the K value remains unchanged to match the uniform upward trend. When the temperature is rising slowly, remaining constant, or decreasing (the rate of temperature increase decreases), the K value decreases accordingly to match the slowing upward trend, thereby improving the sensitivity to interference.

[0028] Optionally, M = N.

[0029] According to this application, M and N have the same value, making control simpler.

[0030] Optionally, the initial value of the temperature adjustment value K is 0.5°C to 8°C.

[0031] According to this application, the initial value of the temperature adjustment value K is 0.5°C to 8°C, which is within the range of temperature changes during cooking and heating.

[0032] Optionally, the second preset sampling period is 0.1s to 8s.

[0033] According to this application, the second preset sampling period is 0.1s to 8s, which can detect temperature changes in a timely manner.

[0034] Optionally, adjusting the temperature adjustment value K includes:

[0035] When the subsequent temperature sensing value T2 is higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is increased.

[0036] When the subsequent temperature sensing value T2 is equal to the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is kept unchanged.

[0037] When the subsequent temperature sensing value T2 is lower than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is reduced.

[0038] According to this application, when the temperature is rising rapidly (the rate of temperature increase increases), the K value increases accordingly to match the upward trend, avoiding misinterpreting the actual temperature increase as interference. When the temperature is rising steadily (the rate of temperature increase remains constant), the K value remains unchanged to match the uniform upward trend. When the temperature is rising slowly, remaining constant, or decreasing (the rate of temperature increase decreases), the K value decreases accordingly to match the slowing upward trend, thereby improving the sensitivity to interference.

[0039] Optionally, the control method further includes:

[0040] During the operation of the cooking appliance, before heating, a first temperature sampling process is performed. In this first temperature sampling process, the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at a first preset sampling period.

[0041] In the first temperature sampling process, heating is only performed after at least two consecutive temperature sensing values ​​are the same.

[0042] After heating begins, a second temperature sampling process is executed, in which the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at the second preset sampling period.

[0043] According to this application, the cooking appliance only starts cooking and heating when there are virtually no interference signals, which is beneficial for obtaining effective temperature sensing data.

[0044] Optionally,

[0045] The first preset sampling period is 0.1 seconds to 1 second; and / or

[0046] The first preset sampling period may be the same as or different from the second preset sampling period.

[0047] According to this application, the first preset sampling period can be flexibly set.

[0048] Optionally, the control method further includes:

[0049] In each of the first preset sampling periods, a preset number of temperature sensing values ​​of the temperature sensors of the cooking appliance are periodically acquired in a third preset sampling period, and the average value of the preset number of temperature sensing values ​​is taken as the temperature sensing value periodically acquired in the first preset sampling period, wherein the third preset sampling period is shorter than the first preset sampling period.

[0050] further,

[0051] The third preset sampling period is 5ms to 20ms;

[0052] The preset quantity is 5-40.

[0053] According to this application, the cooking appliance eliminates the influence of short-term interference signals on the temperature sensing value by taking an average value.

[0054] Optionally, the control method further includes:

[0055] The first temperature sensing value among the temperature sensing values ​​obtained in the first temperature sampling process with the first preset sampling period is taken as the temperature sensing value obtained in the second temperature sampling process with the second preset sampling period.

[0056] According to this application, the cooking appliance starts heating immediately after the interference signal disappears, saving working time and improving work efficiency.

[0057] Optionally, the control method further includes:

[0058] In each of the second preset sampling periods, the temperature sensing values ​​of the temperature sensors of the cooking appliance are periodically acquired at a fourth preset sampling period, and the average value of the temperature sensing values ​​is taken as the temperature sensing value acquired periodically at the second preset sampling period, wherein the fourth preset sampling period is shorter than the second preset sampling period.

[0059] further,

[0060] The fourth preset sampling period is 5ms to 20ms;

[0061] The number of samples is 5-40.

[0062] According to this application, the cooking appliance eliminates the influence of short-term interference signals on the temperature sensing value by taking an average value.

[0063] A second aspect of this application provides a cooking utensil, the cooking utensil comprising:

[0064] Cooking containers used to hold ingredients;

[0065] A heating device for heating the cooking container;

[0066] Temperature sensor, used to sense heating temperature; and

[0067] The control device is electrically connected to the heating device to control its operation, and is also electrically connected to the temperature sensor to obtain the temperature readings from the sensor.

[0068] The control device is configured to perform the steps of the control method according to any one of the first aspects.

[0069] According to this application, when the heating temperature rises, the influence of interference signals cannot be ruled out. Therefore, such data is not accepted, and the temperature rise is forcibly controlled to prevent the cooking process from prematurely entering the next stage before the current stage is completed, thus affecting the cooking effect. In this way, interference factors are eliminated to a certain extent, while the upward trend of the temperature is preserved to a certain extent. This approach balances both aspects, and comprehensive analysis and processing are more conducive to obtaining effective temperature data. In actual heating processes, temperature changes are not constant; timely adjustment of the K value is beneficial for obtaining effective temperature data.

[0070] Optionally, the cooking appliance is an electromagnetic heating cooking appliance; and / or

[0071] The temperature sensor is used to sense the temperature at the top of the cooking cavity, or the temperature sensor is used to sense the temperature at the bottom of the cooking container.

[0072] According to this application, the cooking appliance is an electromagnetic heating cooking appliance, which generates a large number of electromagnetic signals, which may interfere with the temperature sensor. When the heating temperature rises, the influence of electromagnetic interference signals cannot be ruled out. Therefore, this data is not accepted to avoid the cooking process from prematurely entering the next stage before the current stage is completed, thus affecting the cooking effect. The control method of this application is applicable to temperature sensors that sense the temperature at the top of the cooking cavity, and also to temperature sensors that sense the temperature at the bottom of the cooking container. Attached Figure Description

[0073] The following drawings, which are incorporated herein by reference as part of this application, are provided for understanding the application. The drawings illustrate representative embodiments of the application and are used to explain the principles of the application, not to limit it.

[0074] In the attached image:

[0075] Figure 1This is a perspective view of a cooking utensil according to a specific embodiment of this application;

[0076] Figure 2 This is a side cross-sectional view of a cooking appliance according to a specific embodiment of this application;

[0077] Figure 3 and Figure 4 This is a flowchart illustrating a control method for a cooking appliance according to a specific embodiment of this application.

[0078] Explanation of reference numerals in the attached figures:

[0079] 10: Cooking utensils

[0080] 20: Cover

[0081] 21: Top Temperature Sensor

[0082] 22: Steam valve

[0083] 30: Clay pot

[0084] 31: Inner pot

[0085] 32: Cooking Cavity

[0086] 33: Heating device

[0087] 34: Receiving cavity

[0088] 35: Bottom temperature sensor Detailed Implementation

[0089] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0090] To fully understand this application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0091] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” and the term “second component” does not imply the existence of a “first component.” The use of words such as “first,” “second,” and “third” does not indicate any order and can be interpreted as names.

[0092] It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0093] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0094] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0095] This application provides a cooking appliance and a method for controlling it.

[0096] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0097] like Figure 1 and Figure 2 As shown, in a specific embodiment, the cooking appliance 10 according to this application is, for example, a rice cooker. The cooking appliance 10 may include a cooker body 30 and a lid 20. Typically, the cooker body 30 includes an inner pot 31, which is a cooking container for holding food. The internal space of the inner pot 31 is a cooking cavity 32. The cooker body 30 may have a cylindrical (or other shaped) receiving cavity 34, from which the inner pot 31 can be freely placed or removed for easy cleaning. The inner pot 31 is made of metal and constructed as a rotating body with an opening and an inner cavity formed by the pot wall. The capacity of the inner pot 31 is typically less than 6L; for example, the capacity of the inner pot 31 may be 2L or 4L. The lid 20 is pivotally connected to the cooker body 30 via a pivot axis for closing the cooker body 30. The inner pot 31 is also a cooking container for holding food.

[0098] The cooking appliance 10 has a heating element 33 for performing cooking heating. The heating element 33 (e.g., a coil) is typically located at the bottom of the pot body 30, for example, below the inner pot 31. The heating element 33 is electrically connected to a control device (not shown) for heating the inner pot 31 under the control of the control device, thereby achieving the cooking function. The control device is configured, for example, as a MUC chip. Control program software is built into the control device.

[0099] The cooking appliance 10 also includes a temperature sensing device for sensing the cooking temperature. The temperature sensing device is electrically connected to a control device, allowing the control device to obtain cooking temperature information and control the heating element 33 to operate based on that information. The temperature sensing device may include, for example, at least a top temperature sensor 21 and a bottom temperature sensor 35. The top temperature sensor 21, for example, is disposed in the lid 20 and senses the cooking temperature at the top of the cooking cavity 32. The bottom temperature sensor 35, for example, is disposed in the pot body 30 and contacts the bottom of the inner pot 31 to sense the cooking temperature at the bottom of the cooking container. The temperature sensing device may also include temperature sensors disposed in other locations.

[0100] A steam valve 22 may also be provided in the cover 20 to exhaust steam in the cooking chamber 32 into the environment.

[0101] Understandably, the cooking appliance 10 is controlled by a control device.

[0102] The cooking appliance 10 is constructed, for example, as an electromagnetic heating cooking appliance, that is, the heating device 33 includes an electromagnetic heating coil. Of course, the cooking appliance 10 can also be heated by other heat generation methods.

[0103] Cooking appliance 10 may not be a rice cooker, but rather an electric pressure cooker, electric hot pot, electric frying pan, induction cooker, electric kettle, etc.

[0104] Optionally, during operation, the cooking appliance 10 typically collects the current temperature sensing value from the temperature sensor at a sampling time of approximately 10ms. After collecting 8 to 32 consecutive samples, the average of these samples is taken as one set of temperature sampling data. The control device uses this average temperature sampling data to control the heating device 33 to complete the cooking function. The averaging method is equivalent to a low-pass filtering method, which can effectively eliminate small amounts of interference signals (abrupt signals). However, when encountering strong interference for a longer period (2s to 4s), the 8 to 32 consecutively collected data points will be significantly higher, resulting in an overestimation of the average value. Sudden temperature changes will cause the control device to advance the cooking process to the next stage. However, advancing to the next stage before the current stage is completed will affect the cooking effect (each stage has different cooking power).

[0105] Therefore, cooking utensil 10 adopts such as Figure 3 The control process shown controls the cooking heating.

[0106] Specifically, during the operation of the cooking appliance 10, the control device periodically acquires the temperature sensing values ​​of the temperature sensors (21 or 35) of the cooking appliance 10 at a second preset sampling period, thereby obtaining a sequence of temperature sensing values. It is understood that each temperature sensor has its own sequence of temperature sensing values. In this sequence, when a subsequent temperature sensing value T2 is not lower than (higher than or equal to) the previous temperature sensing value T1, the subsequent temperature sensing value T2 is not accepted; when a subsequent temperature sensing value T2 is lower than the previous temperature sensing value T1, the subsequent temperature sensing value T2 is accepted, that is, the subsequent temperature sensing value T2 is taken as the temperature value of the cooking appliance 100 at the moment when the subsequent temperature sensing value T2 is acquired. Temperature sensing values ​​T1 and T2 are two adjacent values ​​in the sequence. That is, when the temperature rises or remains constant, the control device considers this value to be caused by interference and therefore does not accept it.

[0107] In other words, due to the problems described in the background art, the cooking appliance 10 needs to determine whether each temperature value sensed by the temperature sensor is reliable, for example, whether it is distorted due to interference. That is, each temperature sensing value has its own acquisition (sampling) moment, but whether that value can be considered the temperature of the cooking appliance 10 at that moment requires certain analysis and verification. Therefore, the temperature value of the cooking appliance 10 at the moment each temperature sensing value is acquired may be the sensing value of the temperature sensor at that moment (when the sensing value is considered undistorted and valid), or it may not be the sensing value of the temperature sensor at that moment (when the sensing value is considered distorted and invalid, and in this case, a reliable temperature needs to be assigned to the cooking appliance 10). The control software in the control device controls the heating device 33 to operate based on the finally approved (reliable) temperature value of the cooking appliance 10, rather than controlling the heating device 33 to operate based on the temperature value directly sensed by the temperature sensor.

[0108] When a subsequent temperature sensing value T2 is higher than or equal to a previous temperature sensing value, the subsequent temperature sensing value T2 is not accepted. At this time, the control device uses the sum of the previous temperature sensing value T1 and the temperature adjustment value K as the temperature value at the time of acquisition (sampling) of value T2. In other words, the temperature sensor's sensing value is considered invalid, and the value of T1+K is forcibly taken as the most valid value. In other words, when the temperature sensor's sensing value indicates that the temperature has not decreased, the control device forcibly assumes that the temperature has increased by the temperature adjustment value K. In this way, changes in the temperature data used for analysis by the cooking appliance 10 can be controlled, eliminating interference while preserving the upward trend of the temperature.

[0109] The second preset sampling period is, for example, from 0.1 s to 8 s. For example, in each second preset sampling period, the control device periodically obtains the temperature sensing values of the sampling number of temperature sensors at the fourth preset sampling period, and then takes the average value of the sampling number of temperature sensing values as the temperature sensing value obtained periodically at the second preset sampling period. Among them, the fourth preset sampling period is less than the second preset sampling period. The fourth preset sampling period is, for example, from 5 ms to 20 ms. The sampling number is, for example, 5 - 40. Thus, the cooking appliance 10 reduces the influence of short-term interference on the accuracy of temperature sampling data by taking the average value method, and then reduces the influence of long-term interference on the accuracy of temperature sampling data by controlling the temperature change rate.

[0110] Of course, the cooking appliance 10 can also reduce the influence of short-term interference on the accuracy of temperature sampling data by other low-pass filtering methods.

[0111] In different stages of the cooking process, the change rate of the temperature curve is different. In order to better match the actual cooking process, after each determination of the temperature of the cooking appliance 10, the control device also updates the value of the temperature adjustment value K. For example, make the value of K increase, decrease or remain unchanged. For example, the control device adjusts the value of the temperature adjustment value K according to the next temperature sensing value T2 and the previous temperature sensing value T1.

[0112] For the convenience of expression, the adjusted value of the temperature adjustment value K is denoted as K2, and the value of the temperature adjustment value K before adjustment is denoted as K1. That is, when the next temperature sensing value T2 is higher than or equal to the previous temperature sensing value T1, the next temperature sensing value T2 is not adopted, and the value of T1 + K1 is forced to be the most effective value; when the next temperature sensing value T2 is lower than the previous temperature sensing value T1, the next temperature sensing value T2 is adopted.

[0113] Specifically, when the next temperature sensing value T2 is higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K1, make the value of K increase, for example, make K2 = K1×(1 + M); when the next temperature sensing value T2 is equal to the sum of the previous temperature sensing value T1 and the temperature adjustment value K1, make K2 = K1, that is, keep the value of K unchanged; when the next temperature sensing value T2 is not higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, make the value of K decrease, for example, make K2 = K1×(1 - N). Among them, M and N are percentage constants, 0 < M < 1, 0 < N < 1, for example, 1% ≤ M ≤ 20%, 5% ≤ M ≤ 15%, 1% ≤ N ≤ 20%, 5% ≤ N ≤ 15%, and M and N can be set to the same value.

[0114] In other words, when the temperature is in a state of accelerating increase (the rate of change of temperature increase is increasing), in order to conform to the rising trend, the K value increases correspondingly to avoid misinterpreting the real temperature increase as caused by interference. When the temperature is in a state of steady increase (the rate of change of temperature increase remains unchanged), in order to conform to the trend of uniform increase, the K value remains unchanged. When the temperature is in a state of slow increase or no change or decrease (the rate of change of temperature increase decreases), in order to conform to the trend of slowing increase, the K value decreases correspondingly to improve the sensitivity to anti-interference.

[0115] Since the characteristic of cooking heating is that the temperature of the food material gradually increases, usually when the temperature rises to the preset value, the cooking process enters the next stage. Therefore, this application focuses on judging whether the temperature increase is caused by an interference signal, directly adopts the sensed data when the temperature decreases (when T2 < T1, the rate of change of temperature is negative), and at the same time reduces the K value.

[0116] The initial value K0 of the temperature adjustment value K is, for example, 0.5 °C to 8 °C.

[0117] In order to minimize the interference signal during the cooking process, preferably, the cooking appliance 10 selects to perform cooking heating only when there is no interference as much as possible. For example, during the operation of the cooking appliance 10, before heating, a first temperature sampling process is executed. In the first temperature sampling process, the control device periodically obtains the temperature sensing value of the temperature sensor of the cooking appliance 10 at a first preset sampling period. In the first temperature sampling process, heating is only executed after at least two consecutive temperature sensing values are the same. After the heating starts, a second temperature sampling process is executed. In the second temperature sampling process, the temperature sensing value of the temperature sensor of the cooking appliance 10 is periodically obtained at the aforementioned second preset sampling period. The first preset sampling period is, for example, 0.1 second to 1 second. The first preset sampling period and the second preset sampling period may be the same or different.

[0118] When not heated, the temperature of the cooking appliance 10 is basically constant, for example, the ambient temperature. Therefore, in the first temperature sampling process, the temperature values collected at the first preset sampling period should be basically unchanged. If there is a change, it means that there is an interference signal at this time and heating should not be executed.

[0119] Preferably, in each first preset sampling period, the control device periodically acquires the temperature sensing values ​​of a preset number of temperature sensors of the cooking appliances 10 at a third preset sampling period, and uses the average value of these preset number of temperature sensing values ​​as the temperature sensing value periodically acquired at the first preset sampling period. The third preset sampling period is shorter than the first preset sampling period. That is, the influence of short-term interference is eliminated by taking the average value. The third preset sampling period is, for example, 5ms to 20ms. The third preset sampling period can be the same as the fourth preset sampling period. The preset number is, for example, 5-40. The preset number can be the same as the aforementioned sampling number.

[0120] Optionally, when at least two consecutive temperature sensing values ​​acquired by the control device in a first preset sampling period are equal, the equal value is taken as the first of the temperature sensing values ​​acquired in a second preset sampling period. Preferably, the first preset sampling period and the second preset sampling period are the same. That is, the control device always collects temperature data at the same sampling rate, and starts heating in a timely manner when the temperature stabilizes, improving work efficiency. The equal temperature sampling value in the first temperature sampling process is both the last value in the first temperature sampling process and the first value in the second temperature sampling process.

[0121] Of course, the cooking appliance 10 may also use only the process of collecting temperature during the first preset sampling period to determine the heating start time, without using the collected temperature as the initial value of the temperature collected during the second preset sampling period. That is, the two sampling processes use their respective data.

[0122] The following specific examples further illustrate this point. Figure 3 The control flow is shown.

[0123] In a specific working process, if two consecutive temperature sensing values ​​are identical before heating, the temperature is considered valid, and heating is initiated to enter cooking mode. The initial temperature collected is 20℃, and the initial value of the temperature adjustment value K, K0, is set to 1℃, the percentage constant M is set to 10%, and the percentage constant N is also set to 10%.

[0124] After heating, the MCU checks the current temperature every 1 second (the second preset sampling rate is 1 time / second).

[0125] The first temperature collected at the second preset sampling rate is 23°C. At this time, T1 is 20°C, T2 is 23°C, and K is 1°C. Since T2>T1 and the difference between T2 and T1 is 23 - 20 = 3°C, which exceeds 1°C, the value of 23°C is not adopted, and it is forced to be considered that the first valid temperature is T1 + K1 = 20 + 1 = 21°C (i.e., the temperature is updated to 21°C). At the same time, the K value is updated, K2 = K1×(1 + M) = 1×1.1 = 1.1°C (i.e., the temperature can be increased by 1.1°C next time).

[0126] At this time, the data is updated to K = 1.1°C and T1 = 21°C. The second temperature collected at the second preset sampling rate is 22.1°C, that is, the new T2 is 22.1°C. Since T2>T1 and T2 - T1 = 1.1°C, the temperature value of 21.1°C is not adopted, and it is forced to be considered that the second valid temperature is T1 + K1 = 21 + 1.1 = 22.1°C (i.e., the temperature is updated to 22.1°C). At the same time, there is no need to update the K value.

[0127] At this time, the data is updated to K = 1.1°C and T1 = 22.1°C. The third temperature collected at the second preset sampling rate is 22°C, that is, the new T2 is 22°C. Since T2<T1, the temperature value of 22°C is adopted. At the same time, the K value is updated, K2 = K1×(1 - N) = 1.1×0.9 = 0.99°C.

[0128] At this time, the data is updated to K = 0.99°C and T1 = 22°C. The third temperature collected at the second preset sampling rate is 22°C, that is, the new T2 is 22°C. Since T2 = T1, the temperature value of 22°C is not adopted, and it is forced to be considered that the second valid temperature is T1 + K1 = 22 + 0.99 = 22.99°C (i.e., the temperature is updated to 22.99°C). At the same time, the K value is updated, K2 = K1×(1 - N) = 0.99×0.9 = 0.891°C.

[0129] At this time, the data is updated to K = 0.891°C and T1 = 22.99°C. The third temperature collected at the second preset sampling rate is 23.5°C, that is, the new T2 is 23.5°C. Since T2>T1 and T2 - T1 = 23.5 - 22.99 = 0.51°C, which is less than 0.891°C, the temperature value of 23.5°C is not adopted, and it is forced to be considered that the second valid temperature is T1 + K1 = 22.99 + 0.891 = 23.881°C (i.e., the temperature is updated to 23.881°C). At the same time, the K value is updated, K2 = K1×(1 - N) = 0.891×0.9 = 0.8019°C.

[0130] Figure 4 In the shown control flow, with Figure 3The difference in the process is that when T2 = T1, the value of T2 is accepted. That is, only when the temperature rises does the control device consider this value to be caused by interference and therefore does not accept it. When the temperature remains constant or decreases, the control device accepts the value sensed by the temperature sensor. Figure 4 In the control flow shown, the adjustment method of the K value is the same as... Figure 3 The process is the same.

[0131] The processes and steps described in all the preferred embodiments above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than those described above. The order of steps in the above process can also be added, combined, or deleted according to actual needs.

[0132] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0133] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0134] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0135] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. A method for controlling a cooking utensil, characterized in that, include: During the operation of the cooking appliance, the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at a second preset sampling period. When the subsequent temperature sensing value T2 is higher than the previous temperature sensing value T1, the sum of the previous temperature sensing value T1 and the temperature adjustment value K is taken as the temperature value of the cooking appliance at the moment when the subsequent temperature sensing value T2 is acquired. Furthermore, after determining the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired, the value of the temperature adjustment value K is adjusted.

2. The control method for cooking appliances according to claim 1, characterized in that, The control method further includes: When the subsequent temperature sensing value T2 is equal to the previous temperature sensing value T1 The sum of the previous temperature sensing value T1 and the temperature adjustment value K is taken as the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired; or, the next temperature sensing value T2 is taken as the temperature value of the cooking appliance at the moment when the next temperature sensing value T2 is acquired.

3. The control method for cooking appliances according to claim 1, characterized in that, The control method further includes: When the subsequent temperature sensing value T2 is less than the previous temperature sensing value T1, the subsequent temperature sensing value T2 is taken as the temperature value of the cooking appliance at the moment when the subsequent temperature sensing value T2 is acquired.

4. The control method for cooking appliances according to claim 1, characterized in that, Adjusting the temperature adjustment value K includes: The temperature adjustment value K is adjusted based on the latter temperature sensing value T2 and the former temperature sensing value T1.

5. The control method for cooking appliances according to claim 4, characterized in that, The step of adjusting the temperature adjustment value K based on the subsequent temperature sensing value T2 and the previous temperature sensing value T1 includes: When the subsequent temperature sensing value T2 is higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, make K2 = K1 × (1 + M); When the subsequent temperature sensing value T2 is equal to the sum of the previous temperature sensing value T1 and the temperature adjustment value K, then K2 = K1; When the subsequent temperature sensing value T2 is lower than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, make K2 = K1 × (1-N); Where K2 is the adjusted temperature adjustment value K, K1 is the original temperature adjustment value K, and 0 <M<1,0<N<1。 6. The control method for cooking appliances according to claim 5, characterized in that, 1% ≤ M ≤ 20%, and / or 1% ≤ N ≤ 20%.

7. The method for controlling a cooking appliance according to claim 6, characterized in that, 5% ≤ M ≤ 15%, and / or, 5% ≤ N ≤ 15%.

8. The method for controlling a cooking appliance according to claim 5, characterized in that, M = N.

9. The control method for cooking appliances according to claim 1, characterized in that, The initial value of the temperature adjustment value K is 0.5℃ to 8℃; and / or The second preset sampling period is 0.1s to 8s.

10. The control method for a cooking appliance according to claim 1, characterized in that, Adjusting the temperature adjustment value K includes: When the subsequent temperature sensing value T2 is higher than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is increased. When the subsequent temperature sensing value T2 is equal to the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is kept unchanged. When the subsequent temperature sensing value T2 is lower than the sum of the previous temperature sensing value T1 and the temperature adjustment value K, the temperature adjustment value K is reduced.

11. The method for controlling a cooking appliance according to any one of claims 1 to 10, characterized in that, The control method further includes: During the operation of the cooking appliance, before heating, a first temperature sampling process is performed. In this first temperature sampling process, the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at a first preset sampling period. In the first temperature sampling process, heating is only performed after at least two consecutive temperature sensing values ​​are the same. After heating begins, a second temperature sampling process is executed, in which the temperature sensing values ​​of the cooking appliance's temperature sensor are periodically acquired at the second preset sampling period.

12. The control method for a cooking appliance according to claim 11, characterized in that, The first preset sampling period is 0.1 seconds to 1 second; and / or The first preset sampling period may be the same as or different from the second preset sampling period.

13. The method for controlling a cooking appliance according to claim 11, characterized in that, The control method further includes: In each of the first preset sampling periods, a preset number of temperature sensing values ​​of the temperature sensors of the cooking appliance are periodically acquired in a third preset sampling period, and the average value of the preset number of temperature sensing values ​​is taken as the temperature sensing value periodically acquired in the first preset sampling period, wherein the third preset sampling period is shorter than the first preset sampling period.

14. The method for controlling a cooking appliance according to claim 13, characterized in that, The third preset sampling period is 5ms to 20ms; The preset quantity is 5-40.

15. The control method for a cooking appliance according to claim 11, characterized in that, The control method further includes: The first temperature sensing value among the temperature sensing values ​​obtained in the first temperature sampling process with the first preset sampling period is taken as the temperature sensing value obtained in the second temperature sampling process with the second preset sampling period.

16. The method for controlling a cooking appliance according to any one of claims 1 to 10, characterized in that, The control method further includes: In each of the second preset sampling periods, the temperature sensing values ​​of the temperature sensors of the cooking appliance are periodically acquired at a fourth preset sampling period, and the average value of the temperature sensing values ​​is taken as the temperature sensing value acquired periodically at the second preset sampling period, wherein the fourth preset sampling period is shorter than the second preset sampling period.

17. The method for controlling a cooking appliance according to claim 16, characterized in that, The fourth preset sampling period is 5ms to 20ms; The number of samples is 5-40.

18. A cooking utensil, characterized in that, The cooking appliance includes: A cooking container, wherein the interior of the cooking container forms a cooking cavity for holding food ingredients; A heating device for heating the cooking container; Temperature sensor, used to sense heating temperature; and The control device is electrically connected to the heating device to control its operation, and is also electrically connected to the temperature sensor to obtain the temperature readings from the sensor. The control device is configured to perform the steps of the control method according to any one of claims 1 to 17.

19. The cooking utensil according to claim 18, characterized in that, The cooking appliance is an electromagnetic heating cooking appliance; and / or The temperature sensor is used to sense the temperature at the top of the cooking cavity, or the temperature sensor is used to sense the temperature at the bottom of the cooking container.

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